Method and apparatus for digital data compression

Details Method and apparatus for digital data compression Method and apparatus for digital data compression

1983-12-05

1985-03-05

Malzahn, David H.

Boots, shoes, and leggings

364724, G06F 1531

Patent

active

045035105

ABSTRACT:
Digital data compression method and means are disclosed which allow for transmission of digital data over a short time period and/or narrow bandwidth transmission line. Also a maximum amount of information may be stored on a movable recording medium using data compression method of this invention. Digital signals to be stored and/or transmitted first are compressed using a finite-impulse response digital compression filter which generates estimated signal values which are subtracted from actual signal values to provide a sequence of difference signals. The difference signals are encoded using a truncated Huffman type encoding method and means, and the encoded signals are transmitted to a remote receiver and/or are recorded. The receiver includes a decoder and digital reconstruction filter for exact reproduction of transmitted digital signals. The invention is well adapted for storage and/or transmission of three lead electrocardiogram (ECG) signals, recording and playback of music, and the like.

REFERENCES:
patent: 3987285 (1976-10-01), Perry
patent: 4224678 (1980-09-01), Lynch et al.
Ripley et al., "A Computer System for Capturing Transient Electrocardiographic Data" Proc. Comput. Cardiol., 1976, pp. 439-445.
Ruttiman et al., "Compression of the ECG by Prediction or Interpolation and Entropy Encoding" IEEE Trans. on Biomedical Engineering, vol. BME-26, No. 11, pp. 613-623, Nov. 1979.

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